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Accounts Payable and Accrued Expenses (Tables) | 12 Months Ended
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Dec. 31, 2019
Payables and Accruals [Abstract] |
Schedule of Accounts Payable and Accrued Liabilities | Accounts payable and accrued expenses consist of the following:
|  | December 31, |
|  | 2018 |  |  | 2019 |
Accounts payable |  | $ | 6,644 |  |  | $ | 15,400 |
Accrued warranty |  |  | 422 |  |  |  | 632 |
Accrued compensation |  |  | 870 |  |  |  | 5,517 |
Contract liabilities |  |  | - |  |  |  | 849 |
Government authorities |  |  | - |  |  |  | 2,172 |
Other current liabilities |  |  | 91 |  |  |  | 310 |
|  | $ | 8,027 |  |  | $ | 24,880 |
Schedule of Product Warranty Liability | The following table summarizes warranty activity during the years ended December 31, 2018 and 2019:
|  | Year Ended |
|  | 2018 |  |  | 2019 |
Accrued warranty reserve, beginning of year |  | $ | 535 |  |  | $ | 422 |
Accrued warranties assumed |  |  |  |  |  |  | 483 |
Accrual for product warranties issued |  |  | 192 |  |  |  | 574 |
Product replacements and other warranty expenditures |  |  | (182 | ) |  |  | 484 | )
Expiration of warranties |  |  | (123 | ) |  |  | (253 | )
Accrued warranty reserve, end of period (a) |  | $ | 422 |  |  | $ | 742 |
(a) Includes accrued warranty and other liabilities at December 31, 2018 and 2019 of $-0- and $110, respectively.

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- Definition Tabular disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses. + References No definition available. + Details
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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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